Perfluoroallylbenzene (I) can be isomerized under the action of HSO3F to form perfluoropropenylbenzene (in the form of a mixture of cis-and trans-isomers) which undergoes anodic oxidation in HSO3F to give α, β-bis (fluorosulfonyloxy) perfluoropropylbenzene (III). Reaction of III with CsF in tetraglyme gives perfluoro-2- methylbenzoxolene (XII), whereas III is converted to perfluoromethylphenyl-α-dione (IX) by ...
